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Finding the Fourth Proportional to 343,388.84, 515,075.41 and 90,687.14

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Solution

The fourth proportional to 343,388.84, 515,075.41 and 90,687.14 is: 136,028.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,388.84 : 515,075.41 = 90,687.14 : x
  2. Step 2: Convert to fraction form
    343,388.84/515,075.41 = 90,687.14/x
  3. Step 3: Cross multiply
    343,388.84x = 515,075.41 × 90,687.14
  4. Step 4: Simplify right side
    343,388.84x = 46,710,717,673.93
  5. Step 5: Solve for x
    x = 46,710,717,673.93/343,388.84
  6. Step 6: Final answer
    x = 136,028.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.